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Home >> Infiniti >> 2006 >> FX45 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Body, Lock & Security System >> Power Door Lock System >> Check Key Switch

Check Key Switch

  1. CHECK KEY SWITCH INPUT SIGNAL 

    With CONSULT-II 

    Check ignition key switch "KEY ON SW" in "DATA MONITOR" mode with CONSULT-II.

    • When key is inserted in ignition key cylinder

      KEY ON SW : ON 

    • When key is removed from ignition key cylinder

      KEY ON SW : OFF 

      Fig 1: CONSULT-II DISPLAY - "DATA MONITOR"
      G04076937Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    Check voltage between BCM connector and ground.

    CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

    Connector Terminal Condition of key switch Voltage (V) Approx.
    (+) (-)
    M3 37 (B/W) Ground Key is inserted in IGN key cylinder. Battery voltage
    Key is removed from IGN key cylinder. 0
    Fig 2: Identifying Voltage Between BCM Connector And Ground
    G04076938Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : Key switch circuit is OK.

    NG : GO TO 2. (With Intelligent Key)

    NG : GO TO  3. (Without Intelligent Key)

  2. CHECK KEY SWITCH (WITH INTELLIGENT KEY) 
    1. Disconnect key switch and ignition knob switch connector.
    2. Check continuity between key switch or key switch and ignition knob switch terminals 3 and 4.
      CONTINUITY SPECIFICATIONS

      Terminal Condition of key switch Continuity
      3 4 Key is inserted in IGN key cylinder. Yes
      Key is removed from IGN key cylinder. No
      Fig 3: Identifying Continuity Between Key Switch Or Key Switch And Ignition Knob Switch Terminals 3 And 4
      G04076939Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : Check the following.

    • 15A fuse (No. 22, located in fuse and fusible link block)
    • Harness for open or short between key switch and fuse
    • Harness for open or short between BCM and key switch

    NG : Replace key switch or key switch and ignition knob switch.

  3. CHECK KEY SWITCH (WITHOUT INTELLIGENT KEY) 
    1. Disconnect key switch connector.
    2. Check continuity between key switch terminals 1 and 2.
      CONTINUITY SPECIFICATIONS

      Terminal Condition of key switch Continuity
      1 2 Key is inserted in IGN key cylinder. Yes
      Key is removed from IGN key cylinder. No
      Fig 4: Identifying Continuity Between Key Switch Terminals 1 And 2
      G04076940Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : Check the following.

    • 15A fuse (No. 22, located in fuse and fusible link block)
    • Harness for open or short between key switch and fuse
    • Harness for open or short between BCM and key switch

    NG : Replace key switch or key switch and ignition knob switch.

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